Contradiction with Proverbs 12:22
This verse states that lying lips are an abomination to the Lord, which contradicts Joshua 2:5 where Rahab lies about the spies' whereabouts.
Proverbs 12:22: Lying lips [are] abomination to the LORD: but they that deal truly [are] his delight.
Contradiction with Exodus 20:16
The verse commands not to bear false witness, contradicting Rahab's lie in Joshua 2:5.
Exodus 20:16: Thou shalt not bear false witness against thy neighbour.
Contradiction with Colossians 3:9
This verse instructs not to lie to one another, contradicting the deceit in Joshua 2:5.
Colossians 3:9: Lie not one to another, seeing that ye have put off the old man with his deeds;
Contradiction with Ephesians 4:25
The verse encourages speaking truth with a neighbor, contradicting the deceitful act in Joshua 2:5.
Ephesians 4:25: Wherefore putting away lying, speak every man truth with his neighbour: for we are members one of another.
Contradiction with Revelation 21:8
Liars are mentioned as part of those with their part in the lake of fire, opposing the lie told in Joshua 2:5.
Revelation 21:8: But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death.
Paradox #1
The contradiction in Joshua 2:5 could be that Rahab lies to protect the spies. This raises the issue of whether it is acceptable to lie if the outcome leads to a perceived greater good. The conflict here is between the act of lying and the positive outcome it achieves.